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(No Model.) 2 SheetsShet '1'.

H. M. WIRZ.

MOLD FOR CASTING PENCIL SHARPBNEES. No. 435,959. Patented Sept. 9,1890..

WITNESSES j Liv'I EJvTpR 06 M4; J B 71/5 Nd M06181.) 2 Sheets-Sheet 2.

. H. WIR Z. MOLD FOR CASTING PENCIL SHARPENERS. NO- 9 vPatentedS'ept.'9, 18903 WITNESSES UNITED STATES PATENT OFFICE.

HENRY M. VIRZ, OF MEDIA, PENNSYLVANIA, ASSIGNOR TO WVESLEY N.

l/VHELESS, OF AUGUSTA, GEORGIA; SUSAN I. WHELESS ADMINIS- TRATRIX OFSAID VESLEY N. lVI-IELESS, DECEASED.

MOLD FOR CASTING PENClL-SHARPENERS.

SPECIFICATION forming part of Letters Patent No. 435,959, datedSeptember 9, 1890.

Application filed June 26,1888. Serial No. 278,222. (No model.)

To all whom it may concern.-

Be it known that I, HENRY M. WIRZ, a citizen of the United State, and aresident of Media, county of Delaware, State of Pennsylvania, haveinvented new and useful Improvements in Molds for Oastin gPencil-Sharpeners, of which the following is a full and exactdescription, reference being had to the accompanying drawings, makingpart of this specification.

My invention relates to that class of molds which are employed for theproduction of castings having other metallic part-s connected therewith,and is especially designed for casting pencil-Sharpeners, wh erein aknife is held upon one side of a chip-throat in the conically-recessedbody.

The objects of my invention are, mainly, to provide mold-sections ofnovel construction which may be easily handled and held while in use tohold the core-mandrel and core in proper position in the mold-section;to form the'core in a novel manner; to securely hold the blade inposition while the casting is effected, and to provide a suitable ventfor the chips at the end of the sharpener, and permit the point of thelead and end of the knife to cross the apex of the conical core; toprovide means for holding the blade in the mold; to hold and operate thechip-throat slide and knife-holding pins in a novel and effectivemanner; to provide the mold with means for forming an opening at themouth of. the sharpener and at the outer end of the chip throat, andalso to provide means for forming an opening at the apex of thesharpener, through which the point of the pencil may be observed.

In the accompanying drawings, Figure 1 represents a plan of the moldcomplete. Figs.

2 and 3 are face views of the two half-sections thereof separated, withthe core and coremandrel shown above Fig. 2, and with a portion of themandrel and the core in Fig. 3 turned partly round to show the seat forthe knife; Fig. 3%, a detail section of part of one of. themold-sections near the mouth of the sharpener-cavity. Figs. 4 and 5 areoutside elevations of the aforesaid mold-sections.

Figs. 6 and 7 are enlarged details of the knifeholding pins; Fig. 8, aperspective vof the knife. Figs. 9 and 10 are perspectives of theopposite sides of the pencil-sharpener; Fig. 11, an elevation ofthelower part of the mold partly broken away to show the means forholding the knife therein; Fig. 12, a perspective of the knife, theconical core, and the parts for holding the knife in the groove of theconical core during the casting process.

The half-sections A and B of the mold are each formed with mortises a intheir adjoining faces of a configuration corresponding with that of theoutside of the sharpener, and also formed with mortises a to receive thecore-mandrel O, to the lower end of which is secured the conical core D.The conical core D, when in place in the mold, fits within the matricesa, with a sufficient space between them to form the wall of thesharpener, and recesses a to form the gate, and a to provide air-ventpassages in the molds which communicate with the matrix.

At the lower end of the core D, adjacent to the mandrel, is a lug orprojection E, from the edge of which a groove F extends to the apex ofthe core and continues along acylindrical extension G of the core to theend thereof, in which groove the edge of the knife is placed preparatoryto casting the body of the sharpener upon the same.

The lug E rests within the annular recess 6 at the mouth of the matrixCt and forms a depression in the mouth of the sharpener on a line withthe chip-throat thereof, as shown at Z in Fig. 9, thus leavingexposedfor action that part of the knife-blade which would otherwise beburied in the cast metal.

An abutment E, located within the recess 6 and eithersecured separatelyto or forming a part of the mold-section B, serves, together with thespring-actuated pin U, hereinafter described, to hold the upper end ofthe knife in the mold-section. The abutment E is preferably formed of aseparte plate of wrought metal passed through a hole in the mold-sectionB and projecting at its inner end into or across the recess ein theupper end of the ma trix. The knife is thus held between the abutment Eupon the mold-section and the springac-tuated pin U to rest sccurelyinthe groove of the mold at the proper cutting-angle.

A projection H atthe bottom of the conical part of the matrix in themold-section A and opposite the cylindrical extension G of the core,when the latter is in its place in the mold, will provide an aperture Zin the sharpener, through which the point of the pencil 1o n1ay beobserved while being sharpened.

The mandrel C has ashoulder I, which rests against the top of the moldwhen the plunger is in place, and a pin K, projecting radially from thesaid shoulder, passesbetween guide-pinsL,

projecting upwardly from the top of the mold,

to properly locate the core in the mold when inserted therein.

A throat-slide N, fitted in recesses a in the mold-sections A and B,hasa beveled and inclined edge at, which fits the groove F in thecone-shaped core and is held firmly in said groove when the core is inplace by a spring 5, secured to a lug A, projecting from themold-section A and pressing at its free end against a pin a, projectingfrom the face of said throat-slide. The throatslide is guided at itsinner end between notched pins P, proj ectin g from the mold-section A,and is guided at its outer end in a seat 0' in the upturned 0 end of aguide-bar R, secured by screws '7" to 5 throat-slide open when thecasting is to be removed from the mold. The knife-blade Y is placed inthe groove F of the core D, to rest at its upper end upon the lug E,projecting from the shoulder of the mandrel, and at its 40 lower end tobear in the groove upon the cylindrical extension of the core, thuscrossing the apex of the cone to form the point of the pencil. The knifeis held securely in the groove F by a pin T, secured to the end of 5 thebar T, which slides within a hole bored through the mold-section B inposition to allow the said pin T to press against the back of the knifeand be held therein with a yield ing pressure by means of a spring Tpassing through a portion of the mold-section B and bearing upon theouter end of the bar T. The knife-blade is further held securely in thegroove F, to bear against the lug E by a pin U, secured to aspring-actuated arm U,

which passes through a hole bored in the mold-section B near theenlarged end of the matrix a, the said arm U being pressed in-- wardlyby a spring U secured to the moldsection B, and withdrawn from contactwith the knife-blade by a disk U having an arm Uflsupported upon thesaid mold-section. The ends of a yoke V pass through holes in themold-section A upon opposite sides of the recess a, and a cross-bar V,secured in perforations made in the ends of the said yoke, op-

erates in a slot in the arm V of the moldsection A and is acted upon bya spiral spring V the steady-pins.

surrounding said arm to hold the neck of the yoke closely against themandrel 0 when the said mandrel is passed into the recess a of themold-section A. The mandrel C has a beveled face a at its lower edge,and atransverse recess 0 midway of its length, the inclined face servingto push the yoke outwardly against the pressure of the spring to rideover the mandrel, and the recess 0 serving to receive the yoke when themandrel and core have been properly seated in the moldsection A, andhold them securely in proper relation to each other while the section Bis placed in position upon the section A. The section B is recessed at bto receive the neck of the yoke when the mold-sections are fittedtogether, and will thus serve, together with matching pins 12 in one ofthe mold-sections and corresponding holes b in the other section, tohold said sections in proper relation to each other to receive themetal. The outer sides of the mold-sections are flattened at w 00 toreceive the jaws of a vice or other suitable clamping device for holdingthe molds together, and each of the mold-sections has a taperinglaterally extending arm W, by means of which the molds may beconveniently handled.

The operation of the device is as follows: The cam-disk S having beenfirst thrown back by the lever S to allow the spring-actuatedthroat-plate to assume its position in the matrix, the mandrel and coreare inserted between the yoke V and the mold-section A and presseddownward, the beveled face 0 of the mandrel serving to push the yokeoutward against the pressure of its spring and hold the mandrel againstthe semi-cylindrical recess a at the upperend of the mold. \Vhen theshoulder I of the mandrel descends, it is guided by the pins K and L tobring the knife-recess in proper position in the mold, and when the saidshoulder is arrested and abuts against the upper end of the mold-sectionA the cylindrical core-extension G will be opposite the mold projectionH, and the neck of the yoke V will drop into the recess a and hold thesaid moldsection A securely upon the mandrel. The knife is now droppedinto position with its beveled edge resting on the beveled edge of theslide N and its upper end on the lug E, now in position and forming aprolongation of the edge of said slide. The mold-section B is thenplaced upon the section A, and said sections are brought accuratelytogether by The cam-disk U is now moved out of the way by the arm U, andthe spring U forces the pin U against the side of the upper end of theknife to hold it firmly in its groove in the core. The pin T pressesagainst the back of the knife, and together with the pin U holds thesaid knife firmly in groove F with a gentle press ure, while thethroat-slide N fits closely against the edge of the knife and preventsthe molten metal from coming in contact with the cylindrical coreprojection extending be yond the apex of the core, and provides anextended support for the lower end of the knife, which is required tocross the apex of the core. The mold-sections are then securely ablemeans.

I- claim as my invention and desire to secure by Letters Patent- 1.InatWo-part mold, the combination,with

one of the mold-sections, of a spring-actuated yoke supported thereon,and a core-mandrel adapted to fit between the said yoke and itsmold-section, substantially as described.

2. In a two-part mold, the combination, with one of the mold-sections,of the spring-actuated yoke supported thereon, and a coremandrel havinga beveled lower edge and a transverse recess to receive said yoke, substantially as described.

3. The combination, with the sections, of a mold for casting metallicarticles having laterally-projecting arms, a U-shaped yoke whose endspass through one of the mold-sections, a cross-bar connecting the yokeends, as described, a spiral spring surroundingthe lateral arm of'saidsection and acting against the cross-bar at the outer ends of the yoke,and a core-mandrel adapted to be held between the yoke and itsmold-section, substantially as described.

4. Thecombination, with the mold-sections, of a vertically-movablecore-1nandrel,a U- shaped spring-actuated yoke fitted upon one of saidsections, and a lateral recess formed in the other of said sections toreceive the neck of the yoke, substantially as described.

5. The combination, with the mold-sections, of the spring-actuated yokesupported upon one of said sections, a movable core-mandrel, andguide-pins projecting laterally from the said mandrel and projecting upfrom said mold-sections, substantially as described.

6. In a mold for casting pencil-sharpeners, the combination, with themold-sections, of

the core-mandrel, the conical core hat ing a cylindrical projection atthe apex thereof, and a knife-slot extending in both the conical and thecylindrical part of said core to pass beyond the apex of said conicalportion and provide a support for the lower end of the knife,substantially as described.

7. The combination, with the molds for pencil-sharpeners, of the conicalcore supported therein having a groove to receive the knife, aspring-actuated pin to bear against the knife, and a cam-disk towithdraw said pin, substantially as described.

8. The combination, with the molds for pencil-sharpeners, of the groovedconical core, the spring-actuated throat-slide, the cam-disk for holdingthe throat-slide in inward or outward position, and the spring-actuatedholding-pin U, supported upon the mold at the upper end of saidthroat-slide, substantially asd escribed.

9. The combination, with the mold for penoil-Sharpeners, of the groovedconical core, the spring-actiiated throat-slide having a beveled andinclined edge the spring-actuated holding pin-U, and the spring-actuatedpin T to bear, respectively, upon the edge, side, and back of the knife,substantially as described.

10. The combination, with the mold for pencil-sharpeners, of thegroovedconical core, a projection E upon the mold of the upper end ofthe core, and the spring-actuated holding pin U, substantially asdescribed.

11. In a pencil-sharpener mold, the combination, with the mold A andthroat-slide N, of the bar R, secured to said mold and having guidewaysto carry the outer end of the throatslide, substantially as described.

12. The combination, with the mold for pencil-sharpeuers, of the groovedconical core, the spring-actuated throat-slide, the cam-disk for holdingthe throat-slide in inward or outward positions, the projection E, andthe springactuated holding-pin U, supported upon the mold at the upperend of said throat-slide, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

I-IENRY M. WIRZ.

\Vitnesses:

H. N. JENKINS, ELLwooD BONSALL.

